Floating reamer holder



Jan. 23, 1968 H. N. GIRARDIN FLOAT ING REAMER HOLDER 2 Sheets-Sheet 1Filed Feb. 17, 1966 INVENTOR HOWARD N. GIRARDIN BY QM 11M 4 0m ATTORNEYSJan. 23, 1968 H. N. GIRARDIN 3,364,798

FLOATING REAMER HOLDER Filed Feb. 17, 1966 2 Sheets-Sheet 2 INVENTORHOWARD N- GIRARDI N ATTORNEYS 14-14 of FIG. 12;.and

3,364,798 PatentedJan. 23, 1968 ice 3,364,798 FLOATING REAMER HOLDER.Empire Tool Company, Memphis, Mich. Filed Feb. 17, 1966, Ser. No.528,170 10 Claims. (Cl. 77-3) This invention relates to a floatingreamer'holder, andmore particularly to a novel reamer holderconstruction. It is the object of the present invention to provide afloating reamer holder, which isself-aligning, and selfcentering formaintaining proper alignment of the reaming tool and its holder.

This and other objects will be seen from the following specification andclaims in conjunction with the appended drawings, in which: a

' FIG. 1 is an end elevational view of the reamer holder.-

FIG. 2 is a section taken on line 2-2 of FIG. 1.

FIG. 3 is a section taken on line 33 of FIG. 2.

FIG. 4 isa fragmentary side elevational view of the mounting shank.

'FIG. 5 is a section taken on line 5-5 of FIG. 4.

FIG. 6 is a side elevational view of the float.

FIG. 7 is a left end elevational view thereof.

FIG. 8 is a right end elevational view thereof.

FIG. 9 is a fragmentary side elevational view of a different form ofshank.

- FIG. 10 is an end elevational view taken on line 10l0 of FIG. 9.

' FIG. 11 is a fragmentary'side elevational view taken on line 11-11 ofFIG. 1.0. J 1 I FIG. 12'is a side elevational view of a different formFIG. 13 is a' right end 'elevational viewtaken on line 13-13 of FIG. 12.FIG. 14 is a left end elevational view taken on line FIG. 15 is a sideelevational view taken on line 15-15 of FIG. 14.

It will be understood that the above drawings illustrate merely apreferred embodiment of the invention, and that other embodiments arecontemplated within the scope of the claims hereafter set forth.

Referring to FIGS. 1-8 and particularly FIG. 2, the

present floating reamer holder includes mounting sleeve 11 with inwardlydirected annular flange 12 at one end having a tapered surface 13 andwith a central aperture 14 through which loosely projects reamermounting sleeve 17. Said sleeve has an enlarged head 18 at one endpositioned within sleeve 11 and having a complemental tapered forwardsurface 19 cooperable with tapered'surface 13 on sleeve 11. Sleeve 17has a central bore 20 within which is snugly and slidably received theshank of a suitable reamer T, fragmentarily shown in dotted lines.

Mounting sleeve 11 at its opposite end has an internal thread 15, andintermediate its ends the annular recess 16. Reamer T is immovablysecured within sleeve 17 by one or more set screws 21. The head 18 ofsleeve 17 has a bore communicating with bore 20 but of less diameter.The end face 26 of the head 18 has formed therein intermediate 7 itsbore and its outer diameter, a pair of transverse aligned opposed slots22 of rectangular cross-section adapted to cooperatively andinterlockingly receive a corresponding pair of flanges 23, which projectfrom one side of the cylindrical float 24. Said float is of less outsidediameter than the internal diameter of mounting sleeve 11 and istherefore spaced from the interior surface thereof.

Opposed aligned ribs of the form shown in FIG. 3, are formed in one endface of float 24 and are arranged at right angles to the opposed pair offlanges 23, which are substantially rectangular in cross-section. Ribs25 cooperatively engage the end face 26 of the reamer holder sleeve 17,by a continuous line contact, for minimum friction and therebyspace theouter ends of the flanges 23 from the bottom of the receiving slots 22formed in the head 18 of sleeve 17. With the sleeve 17 assembled withinthe mounting sleeve 11, as shown in FIGS. 2 and 3, the float is thenintroduced after which the shank is threaded into place in the mannerhereafter described. Projecting from the opposite end face of float 24,are a pair of flanges 27 opposed from each other and in alignment, beingsubstantially rectangular in cross-section. Said flanges 27 are arrangedat right angles to the plane of the other float flanges 23 and projectoppositely therefrom, as illustrated in FIGS. 3 and 6. p

The mounting shank 30, which is adapted to be secured within a movableportion of the machine tool, such as a reamer, fragmentarily indicatedat H, has an enlarged cylindrical head 29. In inner end face 31 thereofare formed a pair of opposed aligned transverse slots 28 which 00- i Ioperatively receive flo'at flanges 27. Said slots 28 havea substantiallyrectangular shape. The end face 31 of the shank-head 29 also has a pairof aligned opposed elongated ridges 32 of arcuate shape as indicated inFIG. 4, which are arranged at right angles to the slots 28. By thisconstruction, there is also straight line contact between float 24 andthe end face 31 of the shank head 29. The shank 30 has elongated centralbore 33 terminating in the countersunk fitting receiving opening 34',whereby a-lubricant may be supplied to reamer holder.

The shank head 29 has an exterior thread 35 which cooperatively engagesthe internal threadsJlS of the mount ing sleeve 11 and upon properthreaded adjustment within. said sleeve is secured in position by thelock-nut 35.to.

complete the assembly. The present float 24 by its arrangement ofoppositely projecting flanges 27 and 23 provides a loose but effectiveconnection between shank 30 and the tool holder sleeve 17 fortransmitting motion thereof, but at the same time the tapered surface 19of the sleeve head 18 cooperates with the corresponding tapered surface13 on the mounting sleeve flange 12' and automatically reali-gns itself.This is possible by virtue of the floating arrangement of the connectingfloat 24 which engages the respective shank 30 by the line contacts 32,and engages the sleeve head 18 by the line contacts 25 to therebyminimize friction therebetween. Thus, there is provided a self-centeringre-aligning floating reamer holder.

Modification FIGS. 9-15 illustrate a modification.

Referring to FIGS. 9, 10 and I], a different form of shank 37 is shownwhich includes the enlarged cylindrical head 38 and which has an outerend face 39 tapered at 40, as indicated in FIG. 9. Tapered portions 40define the central transverse contact line 40'. Said end face uponopposite sides of the bore 37 has apair of opposed aligned transverseslots 41 adapted to cooperatively receive the opposed aligned flanges 42of float 44.

Said flanges project from end face 43 of said float and cooperativelynest within slots 41. In view of the taper 40 on end face 39. it isapparent that there will merely be a straight line contact 40 betweenend face 39 and the end face 43 of float 44. The height of the flanges42is such that said flanges will not extend to the base of the slots 22formed within the end face 26 of sleeve 17, in the manner illustrated inFIG. 2. It will be noted that here the interior of the present floatingbe had to the following claims:

1. A floating reamer holder comprising a mounting sleeve having aninwardly directed annular flange;

' a tool mounting sleeve with an enlarged annular head 'looselypositioned within said-first sleeve and cooperatively bearing againstsaid flange, said' head havingatransverse'slotinits end face;

a mounting shank threaded and secured within said first sleeve;

3 and having a transverse slot in its inner end face, and

. aicylindrical float loosely positioned within said first sleevebetween said head and shank and having formed in its outer facesoutwardly directed flanges loosely nested within said slots.

2. In the reamer holder of claim 1, the interior surface of saidflangebeing tapered, and the corresponding leading end of said headbeing similarly tapered.

3. In the reamer holder of claim 1, the interior surface of said flangebeing forwardly and inwardly tapered, and

the corresponding leading end of said head being similarly tapered. Y

4. In the reamer holder or claim 1, there being a pair of alignedopposed transverse slots in said head end face, and there'being a pairof aligned opposed transverse slots in the shank inner end face,- sai'dfloat having formed in its outer faces a pair of said outwardly directedflanges loosely nested within said slots.

. 5. In the reamer holder of claim 4, said pairs of slotsv .and saidfloat flanges respectively lying in planes at right angles to eachother.

6. In the reamer holder ofclaim 1, one end face of said I float havingan elongated ridge extending thereacross, and

arranged at right angles to the plane of the corresponding flanges insaid end face for cooperative engagement with the end face of said head,said shank having formed in its end face an outwardly projecting ridge,and arranged at right angles to the plane of the corresponding slots insaid shank for cooperative registry with the other end face of saidfloat.

7. In the reamerholder of claim 6, said float ridge being arcuate incross-section, and said shank ridge being arcuate in cross-section. v

8. In the reamer holder of claim 6, said pairs of $10 and said floatflanges respectively lying in planes at right angles to each other.

9. The reamer holder of claim 6, and a lock'nut on said shank cooperablewith said mounting sleeve for securing said float and shank in adjustedposition.

10. In the reamer holder of claim 1, one end face of said float having apair of converging tapered surfaces defining a transverse contact edgeat right angles to the plane of the corresponding flanges in said floatto provide a straight line contactwith the corresponding end face ofsaid 'head, said shank having a pair of inwardly converging surfacesdefining a contact line at right angles to the plane of the slotsformedin said shank providing a straight line contact with thecorresponding other end face of said float.

References Cited UNITED STATES PATENTS 1,618,998 3/1927 Redinger 9e 111,860,762 5/1932 Wyrick 11 2,212,406 8/1940 Rusnak 77 s8 FOREIGN PATENTS831,896 9/1938 France.

GERALD A. DOST, Primary Examiner.

1. A FLOATING REAMER HOLDER COMPRISING A MOUNTING SLEEVE HAVING ANINWARDLY ANNULAR FLANGE; A TOOL MOUNTING SLEEVE WITH AN ENLARGED ANNULARHEAD LOOSELY POSITIONED WITHIN SAID FIRST SLEEVE AND COOPERATIVELYBEARING AGAINST SAID FLANGE, SAID HEAD HAVING A TRANSVERSE SLOT IN ITSEND FACE; A MOUNTING SHANK THREADED AND SECURED WITHIN SAID FIRSTSLEEVE; AND HAVING A TRANSVERSE SLOT IN ITS INNER END FACE, AND ACYLINDRICAL FLOAT LOOSELY POSITIONED WITHIN SAID FIRST SLEEVE BETWEENSAID HEAD AND SHANK AND HAVING FORMED IN ITS OUTER FACES OUTWARDLYDIRECTED FLANGES LOOSELY NESTED WITHIN SAID SLOTS.